function loadGMap() {
  if (GBrowserIsCompatible()) {
    var map = new GMap2(document.getElementById("map"));
    map.setCenter(new GLatLng(51.527, -0.209), 14);
    map.addControl(new GSmallMapControl());
    var point = new GLatLng(51.5260762, -0.2136695);
    var marker = new GMarker(point);
    map.addOverlay(marker);
    function openInfoWindow() {
      marker.openInfoWindowHtml("<b>Deliverers Consultancy Ltd</b><br />Studio 113<br />Network Hub<br />300 Kensal Road<br />London W10 5BE");
    }
    openInfoWindow();
    GEvent.addListener(marker, "click", openInfoWindow);
  }
}
window.onload = loadGMap;
window.onunload = GUnload;